The Ebola outbreak is believed to have killed more than 3,400 people in West Africa and has taken the biggest toll in Liberia. There aren't enough beds in isolation units to keep up with the hundreds who get sick each week.

The three hardest-hit countries of Liberia, Guinea and Sierra Leone had too few doctors and nurses to begin with, and a tremendous number of infections in health care workers during the outbreak has only further reduced their numbers. With more than 370 health care workers sickened by the disease so far, many other clinicians are afraid to care for Ebola patients.

Family member help Siata Johnson, 23, to enter the Ebola treatment centre at the Island Hospital on the outskirts of Monrovia, Liberia. The hospital, with 120 beds for Ebola patients, has remained at full capacity since its opening by the Liberian Ministry of Health and the World Health Organisation in SeptemberJohn Moore/Getty ImagesA woman enters the Ebola treatment centre at the Island Hospital. She said she was bleeding heavily from a miscarriage and was unable to get treatment at other clinics, many of which now refuse to treat bleeding patients due to fears of contracting EbolaJohn Moore/Getty ImagesA sick man is sprayed with disinfectant before entering the Ebola treatment centre at the Island Hospital on the outskirts of MonroviaJohn Moore/Getty ImagesA member of a Liberian Red Cross burial team repairs an emergency vehicle in Monrovia. The team was on the way to retrieve the body of an Ebola victim when their truck broke downJohn Moore/Getty ImagesA Doctors Without Borders staffer washes his hands in chlorinated water as sanitised boots dry at the MSF treatment centre in PaynesvilleJohn Moore/Getty ImagesA Doctors Without Borders health worker in protective clothing holds a child suspected of having Ebola in the MSF treatment centre in Paynesville, LiberiaJohn Moore/Getty ImagesResidents of an Ebola-affected township receive family and home disinfection kits distributed by Doctors Without Borders (MSF) in New Kru Town, LiberiaJohn Moore/Getty ImagesResidents of the Ebola-affected township of New Kru Town walk home with disinfection kits distributed by Doctors Without BordersJohn Moore/Getty ImagesA Liberian Ministry of Health worker is sprayed with disinfectant after removing his anti-contamination suit at a holding centre for suspected Ebola patients at Redemption HospitalJohn Moore/Getty ImagesA Liberian Ministry of Health worker dressed in an anti-contamination suit speaks to Banu, 4, in a holding centre for suspected Ebola patients at Redemption Hospital in MonroviaJohn Moore/Getty ImagesA health worker watches as a burial team collects Ebola victims from a Ministry of Health treatment centre in MonroviaJohn Moore/Getty Images